Upgrade Guide

Sony A7S III→Sony A6100

Is it worth upgrading? Spec analysis, key improvements, and our verdict.

You own

Sony

A7S III

£2999

2020

→

Upgrade to

Sony

A6100

£549 (-£2,450)

2019

⚖️

Situational

One clear hardware improvement over the A7S III. Worth it if that specific upgrade aligns with what you shoot.

What's new in the A6100

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A7S III	A6100
Price	£2,999	£549
Released	2020	2019	↓
Sensor	12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)	APS-C Exmor CMOS
Resolution	12MP	24MP	↑
Video	4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p	4K 30fps
Autofocus	Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition	425-point phase-detect, real-time tracking
Stabilisation	5.5-stop IBIS	None
Burst Rate	10fps mechanical	11fps	↑
Battery Life	~600 shots (CIPA) / ~70min continuous 4K recording	420 shots (CIPA)	↓
Weight	699g (body, battery, card)	396g (body only)	↑
Weather Sealed	Yes	No	↓
Viewfinder	OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made	EVF 0.39" 1.44M-dot
Screen	3.0" vari-angle touchscreen, 1.44M dots	3.0" tilting touchscreen, 921k-dot
Mount	Sony E-mount	Sony E-Mount
Memory Cards	Dual CFexpress Type A / SD UHS-II (both slots)	SD UHS-I / Memory Stick

Compare side-by-side

See A7S III and A6100 next to each other with our interactive comparison tool.

Get a personalised upgrade score

Tell us what you shoot and we'll score the A6100 against your specific genres — not just specs.

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Camera family history